2120510405 has 16 divisors (see below), whose sum is σ = 2741712624. Its totient is φ = 1565137920.

The previous prime is 2120510383. The next prime is 2120510437. The reversal of 2120510405 is 5040150212.

It can be written as a sum of positive squares in 8 ways, for example, as 546484129 + 1574026276 = 23377^2 + 39674^2 .

It is not a de Polignac number, because 2120510405 - 2¹⁴ = 2120494021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146285 + ... + 160125.

It is an arithmetic number, because the mean of its divisors is an integer number (171357039).

Almost surely, 2^2120510405 is an apocalyptic number.

It is an amenable number.

2120510405 is a deficient number, since it is larger than the sum of its proper divisors (621202219).

2120510405 is a wasteful number, since it uses less digits than its factorization.

2120510405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16216.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2120510405 is about 46049.0000434320. Note that the first 4 decimals coincide. The cubic root of 2120510405 is about 1284.7347441603.

Adding to 2120510405 its reverse (5040150212), we get a palindrome (7160660617).

The spelling of 2120510405 in words is "two billion, one hundred twenty million, five hundred ten thousand, four hundred five".